The "Leeberg" of Pettendorf in the market town Hausleiten in the district Korneuburg in Lower Austria is a Scheduled Monument burial mound (Latin: tumulus, plural tumuli). The word "Leeberg" means Hill of the Dead and describes a gravesite. There are Leeberge in several locations of the Weinviertel, the most important with 16 m height is in Großmugl. More recent archaeological evidence indicates that the construction period is supposed to be the Hallstatt culture (850-450 BC) or subsequent Latène period.

In the area of "Leeberg" also late neolithic (around 2800 BC) settlement objects were found. Such findings have been given too little attention in previous years, and there have been no targeted excavations.

The round Leeberg of Pettendorf is located at an altitude of 219 m above sea level and approximately 34 m above the underlying village Gaisruck and about 10 m above the northern fields. The tumulus was banked during the Hallstatt culture and not yet scientifically opened. On the truncated cone a platform was formed in the Middle Ages. In this period it was used for lookout and defense. Partial excavations in the 1980s under Ernst Lauermann revealed that the tumulus was flattened at this time and a circle round surface of about 25 m in diameter was created, which served as an observation and defense means.